How to load plugin script from frontend and get value by id from backend?

jQuery(window).on(‘load’, function(){ var keyword = jQuery(‘#keyword’).val(); //get keyword value var description = jQuery(‘#description’).val(); //get category value jQuery(‘meta[name=keywords]’).attr(‘content’, ‘$keywords’); jQuery(‘meta[name=description]’).attr(‘content’, ‘description’);…

warning :missing argument 2 for wpdb::prepare() and warning:cannot modify header information

Warning: Missing argument 2 for wpdb::prepare(), called in /home1/i9e6m0a8/public_html/contestbuzz.net/wp-content/plugins/contest-beast/contest-beast.php on line 2493 and defined in /home1/i9e6m0a8/public_html/contestbuzz.net/wp-includes/wp-db.php on line 1222 Warning:…